CN115513627B - Frequency divider and antenna array - Google Patents

Abstract

The embodiment of the application discloses a frequency divider and an antenna array, wherein the frequency divider comprises a first filtering structure, a first feeder line, a second filtering structure, a third feeder line, a fourth feeder line and a connecting structure, wherein the first filtering structure is provided with a first passband and is used for generating a transmission zero point at a first frequency point; the first feeder line is coupled with one end of the first filtering structure; the second feeder line is coupled with the other end of the first filtering structure; the second filter structure is provided with a second passband and a transmission zero point, the lowest frequency of the first passband is higher than the highest frequency of the second passband, and the first frequency point and the second frequency point are both positioned between the lowest frequency of the first passband and the highest frequency of the second passband; the third feeder line is coupled with one end of the second filtering structure; the fourth feeder line is coupled with the other end of the second filtering structure; the connection structure is connected with the second feeder line and the third feeder line. The frequency divider of the application embodiment has compact structure, small occupation of volume and low cost.

Description

Frequency divider and antenna array

Technical field

The present application relates to the field of wireless signal transmission, and in particular, to a frequency divider and an antenna array.

Background technique

In related technologies, for wide-band antenna structures, a single antenna array can already meet most millimeter wave application frequency bands (28/39/60GHz). In order to reduce interference between signals, currently used millimeter wave frequency bands such as 28/39GHz are mostly used Different channels, and then different channels correspond to different chip ports, so for this type of antenna array, additional frequency dividers need to be used to improve the isolation between different frequency points to reduce high and low frequency interference between antennas. Generally speaking, cascading a crossover increases the cost and takes up a lot of space.

Contents of the invention

The embodiments of the present application provide a frequency divider and an antenna array, which can improve the technical problems in the above related technologies.

In a first aspect, embodiments of the present application provide a frequency divider, which includes a first filter structure, a first feeder, a second feeder, a second filter structure, a third feeder, a fourth feeder, and a connection structure. The first filter structure has a first passband, and the first filter structure is used to generate a transmission zero point at a first frequency point; a first feeder is coupled to one end of the first filter structure; a second feeder is coupled to the first The other end of the filtering structure is coupled and arranged; the second filtering structure has a second passband, the lowest frequency of the first passband is higher than the highest frequency of the second passband, and the second filtering structure is used in the second The frequency point generates a transmission zero point, the first frequency point and the second frequency point are both located between the lowest frequency of the first passband and the highest frequency of the second passband, and the first frequency point The frequency is lower than the frequency of the second frequency point; the third feeder is coupled to one end of the second filter structure; the fourth feeder is coupled to the other end of the second filter structure; the connection structure connects all the second feeder line and the third feeder line.

In some exemplary embodiments, the second feeder is closer to the second filtering structure than the first feeder, and the third feeder is closer to the first feeder than the fourth feeder. filter structure.

In some exemplary embodiments, the first filtering structure includes: a first resonator, both ends of the first resonator are open circuits, and the two ends of the first resonator are respectively coupled to the first resonator. The feeder line and the second feeder line, the length of the first resonator is half the wavelength corresponding to the central resonance frequency of the first passband; the first open-circuit stub is connected to the first resonator , the length of the first open-circuit section is one-quarter of the wavelength corresponding to the frequency of the first frequency point.

In some exemplary embodiments, the first resonator includes a first metal patch and a second metal patch and a third metal patch that are respectively perpendicular to the first metal patch, and the second metal patch The patch and the third metal patch are respectively connected to both ends of the first metal patch, and the second metal patch and the third metal patch are located on the same side of the first metal patch. Side, the sum of the lengths of the first metal patch, the second metal patch and the third metal patch is one-half of the wavelength corresponding to the central resonant frequency of the first passband; The first open-circuit section includes a fourth metal patch and a fifth, sixth and seventh metal patch vertically connected to the same side of the fourth metal patch. The fourth metal patch The patch is parallel to the first metal patch, the fifth metal patch and the sixth metal patch are disposed between the second metal patch and the third metal patch and are respectively connected to At both ends of the fourth metal patch, the seventh metal patch is disposed between the fifth metal patch and the sixth metal patch, and the two ends of the seventh metal patch are connected respectively. The middle part of the first metal patch and the middle part of the fourth metal patch, the fourth metal patch, the fifth metal patch, the sixth metal patch and the seventh metal patch The sum of the lengths is one quarter of the wavelength corresponding to the frequency of the first frequency point.

In some exemplary embodiments, the length of the first open circuit section is greater than or equal to 1.35 mm and less than or equal to 1.45 mm.

In some exemplary embodiments, the second filtering structure includes: a second resonator, two ends of the second resonator are open circuits, and two ends of the second resonator are respectively coupled to the third The length of the feed line and the fourth feed line, the second resonator is half of the wavelength corresponding to the center frequency of the second passband; the second open circuit section is connected to the second open circuit section In the second resonator, the length of the second open-circuit section is one-quarter of the wavelength corresponding to the center frequency of the second frequency point.

In some exemplary embodiments, the second resonator includes an eighth metal patch and ninth and tenth metal patches that are respectively perpendicular to the eighth metal patch, and the ninth metal patch The patch and the tenth metal patch are respectively connected to both ends of the eighth metal patch, and the ninth metal patch and the tenth metal patch are located on the same side of the eighth metal patch. On the other hand, the sum of the lengths of the eighth metal patch, the ninth metal patch and the tenth metal patch is one-half of the wavelength corresponding to the center frequency of the second passband; so The second open-circuit section includes an eleventh metal patch, the eleventh metal patch is perpendicular to the eighth metal patch, and the eleventh metal patch is connected to the eighth metal patch and Located between the ninth metal patch and the tenth metal patch, the length of the eleventh metal patch is one quarter of the wavelength corresponding to the center frequency of the second frequency point.

In some exemplary embodiments, the length of the second open circuit section is greater than or equal to 0.95 mm and less than or equal to 1.05 mm.

In a second aspect, embodiments of the present application provide an antenna array, including: at least one antenna body, each of which includes two sets of symmetrically arranged antenna structures; and a frequency divider as described in any of the above embodiments. , each frequency divider corresponds to one of the antenna structures, and the connection structure connects the antenna structures.

In some exemplary embodiments, each of the antenna structures includes: a radiation layer, used for transmitting and receiving signals; a first ground layer, used to form a first resonant loop with the radiation layer; a feed layer, disposed on the between the ground layer and the radiation layer, the feed layer is coupled to the radiation layer, the frequency divider is disposed on a side of the first ground layer away from the feed layer, and the connection structure Connect the feed layer; a second ground layer is provided between the first ground layer and the frequency divider, and the second ground layer is used to form a second resonant circuit with the frequency divider.

In some exemplary embodiments, the connection structure includes: a first connection part, the first connection part includes a straight section and an arc section disposed in the middle of the straight section, and the straight section has Two ends are respectively connected to the second feeder and the third feeder; a communication column, one end of the communication column is connected to the arc section; a second connection part, the other end of the communication column is connected to the second connection part, and the second connection part is connected to the feed layer.

In some exemplary embodiments, the feed layer is fan-shaped.

In some exemplary embodiments, the antenna array includes 8 groups of antenna bodies arranged in sequence, and the spacing between each antenna body is less than or equal to the center resonant frequency of the first passband. One-half wavelength.

Beneficial effects: When transmitting and receiving signals, the frequency divider of the embodiment of the present application can provide a high degree of isolation between the first passband signal and the second passband signal, reducing the distance between the first passband signal and the second passband signal. interference between the signals. At the same time, since the connection structure couples the first filter structure, the second filter structure and the antenna, the connection structure can divide the received signal into two or combine the transmitted signal into one, preventing the first filter structure and the second filter structure from being separated from the antenna respectively. connections, thus making the crossover more compact. In addition, the first feeder, the second feeder, the third feeder and the fourth feeder can all be integrated between the dielectric layers of the antenna through printing or etching. Therefore, the frequency divider in the embodiment of the present application occupies less space. Lower cost.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. Those of ordinary skill in the art can also obtain other drawings based on these drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of a frequency divider in an embodiment of the present application;

Figure 2 is a schematic structural diagram of the antenna body in an embodiment of the present application;

Figure 3 is a schematic structural diagram of the antenna body in another embodiment of the present application;

Figure 4 is a schematic structural diagram of the antenna body in another embodiment of the present application;

Figure 5 is a schematic structural diagram of the antenna body in yet another embodiment of the present application;

Figure 6 is an exploded schematic diagram of the partial structure of the frequency divider in an embodiment of the present application;

Figure 7 is a schematic diagram of a port of a frequency divider in an embodiment of the present application;

Figure 8 is a schematic diagram of the frequency response of a frequency divider in an embodiment of the present application;

Figure 9 is a schematic diagram of the stacking structure of the antenna body in an embodiment of the present application;

Figure 10 is a schematic structural diagram of an antenna array in an embodiment of the present application.

Explanation of reference signs: 100. Frequency divider; 110. First filter structure; 111. First resonator; 1111. First metal patch; 1112. Second metal patch; 1113. Third metal patch; 112 , the first open circuit stub; 1121, the fourth metal patch; 1122, the fifth metal patch; 1123, the sixth metal patch; 1124, the seventh metal patch; 120, the first feeder; 130, the second feeder ; 140. The second filter structure; 141. The second resonator; 1411. The eighth metal patch; 1412. The ninth metal patch; 1413. The tenth metal patch; 142. The second open circuit section; 150. The first Three feeders; 160, the fourth feeder; 170, connection structure; 171, first connection part; 1711, straight section; 1712, arc section; 172, connecting column; 173, second connection part; 200, antenna body; 210. Antenna patch; 230. Coupling unit; 300. Antenna array.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application and are not used to limit the present application.

As shown in Figures 1-5, the first aspect of the embodiment of the present application provides a frequency divider 100. The frequency divider 100 implements the frequency dividing function through coupling to improve the isolation between different frequency bands. The frequency divider 100 includes The first filtering structure 110 , the first feeder 120 , the second feeder 130 , the second filtering structure 140 , the third feeder 150 , the fourth feeder 160 and the connection structure 170 . Figures 1-5 illustrate two sets of symmetrically arranged frequency dividers 100.

The first filter structure 110 has a first passband. The first passband is the frequency range that the first filter structure 110 allows to pass. The first filter structure 110 is used to generate a transmission zero point at a first frequency point. The frequency of the first frequency point Located outside the frequency band of the first passband.

The first feeder 120 is coupled to one end of the first filter structure 110. Preferably, the first feeder 120 is gap-coupled with the first filter structure 110, that is, the first feeder 120 and the first filter structure 110 are spaced apart without physical connection, so that The arrangement of the first feeder 120 is facilitated. The second feeder 130 is coupled to the other end of the first filter structure 110. Preferably, the second feeder 130 is gap-coupled with the first filter structure 110, that is, the second feeder 130 and the first filter structure 110 are spaced apart without physical connection. This facilitates the arrangement of the second feeder line 130 .

The second filter structure 140 has a second passband, and the second passband is the frequency range that the second filter structure 140 allows to pass. In order to avoid mutual interference between the first passband and the second passband, there is usually a certain interval between the frequency band of the first passband and the frequency band of the second passband. For example, the first passband is high frequency and the second passband is For low frequency, the following is an example where the lowest frequency of the first passband is higher than the highest frequency of the second passband. The second filter structure 140 is used to generate a transmission zero point at a second frequency point, and the frequency of the second frequency point is outside the frequency range of the second passband.

Among them, the transmission zero point is also called the coupling zero point. The transmission zero point can make the filter transfer function equal to zero, that is, the electromagnetic energy cannot pass through the network at the frequency point corresponding to the transmission zero point, thereby isolating the frequency band near the frequency point. When this frequency point is When the frequency point is outside the passband, it can suppress signals outside the passband, thereby achieving isolation from multiple passbands.

Generally speaking, the frequency band of the first passband and the frequency band of the second passband are likely to cause interference to the frequency band of the first passband and the second passband. Therefore, both the first frequency point and the second frequency point can be set at Between the frequency band of the first passband and the frequency band of the second passband, that is, the first frequency point and the second frequency point are both set between the lowest frequency of the first passband and the highest frequency of the second passband. In some embodiments, the frequency span between the lowest frequency of the first passband and the highest frequency of the second passband is small. In order to avoid the stopband near the first frequency point partially coinciding with the first passband, and to avoid the second The stopband near the second frequency point partially overlaps with the second passband, which can make the first frequency point close to the second passband, and the second frequency point close to the first passband, that is, the frequency of the first frequency point can be set lower than The frequency of the second frequency point, so as to ensure that the signals in the first passband and the second passband are not suppressed. For example, the frequency of the first frequency point may be 32.5 GHz, and the frequency of the second frequency point may be 40 GHz.

The third feeder 150 is coupled to one end of the second filter structure 140. Preferably, the third feeder 150 is gap-coupled with the second filter structure 140, that is, the third feeder 150 and the second filter structure 140 are spaced apart without physical connection, so that It is convenient to arrange the third feeder 150. The fourth feeder 160 is coupled to the other end of the second filter structure 140. Preferably, the fourth feeder 160 is gap-coupled with the second filter structure 140, that is, the fourth feeder 160 and the second filter structure 140 are spaced apart without physical connection. This facilitates the arrangement of the fourth feeder 160.

The connection structure 170 connects the second feeder 130 and the third feeder 150. At the same time, the connection structure 170 is also used to conduct the transceiver signals of the external antenna. The first feed line 120 and the fourth feed line 160 are used to connect the ports of the chip. In order to reduce the size, the antenna is usually configured as a wide-band antenna, that is, the antenna can receive wide-band signals. Broad-band signals are a concept relative to narrow-band signals. Narrow-band signals refer to signals that only include one frequency band, while wide-band signals include multiple Signals in frequency bands, that is to say, the operating bandwidth of the antenna includes at least 2 frequency bands. The connection structure 170 is connected to the second feeder 130 and the third feeder 150 at the same time, so that the connection structure 170 can divide the broadband signal received by the antenna into two channels, so as to filter the two broadband signals into signals in different frequency bands. Alternatively, the connection structure 170 can combine the two signals of different frequency bands filtered by the first filtering structure 110 and the second filtering structure 140 into one signal, and then transmit it to the antenna for transmission. Since the connection structure 170 couples the first filter structure 110 , the second filter structure 140 and the antenna, it is avoided that the first filter structure 110 and the second filter structure 140 are respectively connected to the antenna, making the structure of the frequency divider 100 more compact.

When the antenna receives a signal, the second feeder 130 and the first feeder 120 serve as the input end and the output end of the first filter structure 110 respectively. The third feeder 150 and the fourth feeder 160 are equivalent to serving as the input end and the output end of the second filter structure 140 respectively. Specifically, the connection structure 170 can simultaneously transmit the received signal received by the antenna to the second feeder 130 and the third feeder 150. The second feeder 130 transmits the received signal to the first filtering structure 110 through coupling. The first filtering structure 110 filters the received signal into a signal that is allowed to pass through the first passband. At the same time, the first filtering structure 110 also performs certain suppression on the frequency band between the first passband and the second passband, and then the first feeder 120 couples through The signal filtered by the first filtering structure 110 is received, and the signal filtered by the first filtering structure 110 is transmitted to the chip port (or radio frequency module). Similarly, the third feeder 150 transmits the received signal to the second filtering structure 140 through coupling. The second filtering structure 140 filters the received signal into a signal allowed to pass by the second passband. At the same time, the second filtering structure 140 also filters the received signal into a signal that is allowed to pass through the second passband. The frequency band between the first passband and the second passband is suppressed to a certain extent, and then the fourth feeder 160 receives the filtered signal of the second filtering structure 140 through coupling, and transmits the filtered signal of the second filtering structure 140 to Chip port (or RF module). In this way, the isolation between the first passband and the second passband can be increased, so that the signal received by the chip port (or radio frequency module) has a higher isolation.

When the antenna transmits a signal, the second feeder 130 and the first feeder 120 are equivalent to serving as the output end and the input end of the first filter structure 110 respectively. The third feeder 150 and the fourth feeder 160 are equivalent to serving as the output end and the input end of the second filter structure 140 respectively. Specifically, the chip port (or radio frequency module) transmits the transmission signal to the first feeder 120 and the fourth feeder 160 at the same time. The first feeder 120 transmits the transmission signal to the first filtering structure 110 through coupling. The first filtering structure 110 The transmitted signal is filtered into a signal allowed to pass by the first passband. At the same time, the first filtering structure 110 also suppresses the frequency band between the first passband and the second passband to a certain extent. The second feeder 130 receives the third passband through coupling. A filtering structure 110 filters the signal, and then the second feeder 130 transmits the signal filtered by the first filtering structure 110 to the antenna through the connection structure 170 . Similarly, the fourth feeder 160 sends the transmission signal to the second filtering structure 140 through coupling. The second filtering structure 140 filters the transmission signal into a signal that is allowed to pass by the second passband. At the same time, the second filtering structure 140 also filters the transmission signal into a signal that is allowed to pass through the second passband. The frequency band between the first passband and the second passband is suppressed to a certain extent. The third feeder 150 receives the signal filtered by the second filter structure 140 through coupling, and then the third feeder 150 connects the second filter structure to the signal through the connection structure 170. The 140 filtered signal is transmitted to the antenna, so that the signal emitted by the antenna has a high degree of isolation.

It should be noted that since the first feeder 120, the second feeder 130, the third feeder 150 and the fourth feeder 160 are usually made by printing or etching, and the antenna is usually made by printing or etching, the first The feeder 120, the second feeder 130, the third feeder 150 and the fourth feeder 160 may be integrated between the dielectric layers of the antenna.

To sum up, when transmitting and receiving signals, the frequency divider 100 of the embodiment of the present application can provide a high degree of isolation between the first passband signal and the second passband signal, thereby reducing the distance between the first passband signal and the second passband signal. Mutual interference between signals in the second passband. At the same time, since the connection structure 170 couples the first filtering structure 110, the second filtering structure 140 and the antenna, the connection structure 170 can divide the received signal into two or combine the transmitted signal into one to avoid the first filtering structure 110, the second filtering structure 110 and the second filtering structure 140. The filter structures 140 are respectively connected to the antennas, thereby making the frequency divider 100 more compact. In addition, the first feeder 120 , the second feeder 130 , the third feeder 150 and the fourth feeder 160 can all be integrated between the dielectric layers of the antenna by printing or etching. Therefore, the frequency divider 100 in the embodiment of the present application has a small volume. The occupancy is smaller and the cost is lower.

Continuing to refer to FIGS. 1-5 , in some embodiments, the second feeder 130 is closer to the second filtering structure 140 than the first feeder 120 , and the third feeder 150 is closer to the first filtering structure than the fourth feeder 160 110. The connection structure 170 is disposed between the second feeder 130 and the third feeder 150, so that the structure between the connection structure 170 and the second feeder 130 and the third feeder 150 can be arranged more compactly. It should be noted that the first feed line 120 and the second feed line 130 and the first filter structure 110 may be on the same layer of the circuit board, or may be on different layers of the circuit board. The third feed line 150 and the fourth feed line 160 and the second filter structure 140 may be on the same layer of the circuit board, or may be on different layers of the circuit board.

As shown in FIG. 6 , in some embodiments, the first filter structure 110 includes a first resonator 111 and a first open-circuit stub 112 . The first resonator 111 has a first passband, both ends of the first resonator 111 are open circuits, and the two ends of the first resonator 111 are coupled to the first feeder 120 and the second feeder 130 respectively. The length of the first resonator 111 It is one-half of the wavelength corresponding to the central resonant frequency of the first passband. One-half wavelength can enable the antenna to have a better radiation effect. By adjusting the distance between the first feeder 120 and the first resonator 111 and the distance between the second feeder 130 and the first resonator 111, the coupling coefficient can be changed, thereby better realizing the filtering function.

The first open-circuit stub 112 is connected to the first resonator 111. The length of the first open-circuit stub 112 is one quarter of the wavelength corresponding to the frequency of the first frequency point. The first open-circuit stub 112 can be at the first frequency point. A transmission zero point is generated at the first frequency point, thereby suppressing the transmission of frequency band signals near the first frequency point and improving the isolation between the first passband and the second passband. Of course, the frequency value of the first frequency point can be adjusted by adjusting the length of the first open-circuit stub 112 .

Continuing to refer to FIG. 6 , in some embodiments, the first resonator 111 is in the shape of “博”, the first open-circuit section 112 is in the shape of “山”, and the first open-circuit section 112 of the “mountain” shape is located at “博” The first open-circuit stub 112 does not need to occupy additional space. In addition, the first resonator 111 and the first open-circuit section 112 are folded and bent at multiple places, thereby greatly reducing the size of the first resonator 111 . Moreover, the first resonator 111 and the first open-circuit stub 112 can be made by printing or etching process, which has low manufacturing cost. The first filter structure 110 and the second filter structure 140 can also be integrated between the dielectric layers of the antenna.

Specifically, the first resonator 111 includes a first metal patch 1111 and a second metal patch 1112 and a third metal patch 1113 that are respectively perpendicular to the first metal patch 1111. The second metal patch 1112 and the third metal patch are The patches 1113 are respectively connected to both ends of the first metal patch 1111, and the second metal patch 1112 and the third metal patch 1113 are located on the same side of the first metal patch 1111. The sum of the lengths of the metal patch 1112 and the third metal patch 1113 is half of the wavelength corresponding to the central resonance frequency of the first passband.

The first open circuit section 112 includes a fourth metal patch 1121 and a fifth metal patch 1122 , a sixth metal patch 1123 and a seventh metal patch 1124 that are perpendicular to the fourth metal patch 1121 . The fourth metal patch 1121 Parallel to the first metal patch 1111, the fifth metal patch 1122 and the sixth metal patch 1123 are arranged between the second metal patch 1112 and the third metal patch 1113, and the seventh metal patch 1124 is arranged between the fifth metal patch 1112 and the third metal patch 1113. Between the metal patch 1122 and the sixth metal patch 1123, the fifth metal patch 1122, the sixth metal patch 1123 and the seventh metal patch 1124 are vertically connected to the same side of the fourth metal patch 1121. The patch 1122 and the sixth metal patch 1123 are respectively vertically connected to both ends of the fourth metal patch 1121, and the two ends of the seventh metal patch 1124 are respectively vertically connected to the middle part of the first metal patch 1111 and the fourth metal patch. In the middle of the patch 1121, the sum of the lengths of the fourth metal patch 1121, the fifth metal patch 1122, the sixth metal patch 1123 and the seventh metal patch 1124 is four times the wavelength corresponding to the frequency of the first frequency point. one part.

In some embodiments, the length of the first open-circuit stub 112 is greater than or equal to 1.35 mm and less than or equal to 1.45 mm, thereby generating a transmission zero point near 53 GHz. The length of the first open circuit section 112 is preferably 1.4 mm to facilitate production.

Continuing to refer to FIG. 6 , in some embodiments, the second filtering structure 140 includes a second resonator 141 and a second open-circuit stub 142 . Both ends of the second resonator 141 are open circuits, and the two ends of the second resonator 141 are coupled to the third feeder 150 and the fourth feeder 160 respectively. The length of the second resonator 141 is corresponding to the center frequency of the second passband. One-half of the wavelength, in the same way, one-half of the wavelength can make the antenna have better radiation effect. The second open-circuit section 142 is connected to the second resonator 141. The length of the second open-circuit section 142 is one quarter of the wavelength corresponding to the center frequency of the second frequency point. The second open-circuit section 142 can be at the second frequency. A transmission zero point is generated at the point, thereby suppressing the transmission of frequency band signals near the second frequency point and improving the isolation between the first passband and the second passband. Of course, the frequency value of the second frequency point can be adjusted by adjusting the length of the second open-circuit section 142 .

Referring to FIG. 6 again, in some embodiments, the second resonator 141 is in the shape of “博”, the second open-circuit section 142 is in the shape of “-”, and the first open-circuit section 112 of the “-” shape is located in the shape of “博” The interior of the glyph-shaped second resonator 141 is thus combined to form an "E" shape, so that the second open-circuit stub 142 does not need to occupy additional space. In addition, the second resonator 141 is folded and bent at multiple places, thereby greatly reducing the size of the second resonator 141 . Moreover, the second resonator 141 and the second open-circuit stub 142 can be made by printing or etching process, which has low manufacturing cost. The second filter structure 140 and the second resonator 141 can also be integrated between the dielectric layers of the antenna.

Specifically, the second filter structure 140 includes an eighth metal patch 1411 and a ninth metal patch 1412 and a tenth metal patch 1413 that are respectively perpendicular to the eighth metal patch 1411. The ninth metal patch 1412 and the tenth metal patch are respectively The patches 1413 are vertically connected to both ends of the eighth metal patch 1411, and the ninth metal patch 1412 and the tenth metal patch 1413 are located on the same side of the eighth metal patch 1411. The eighth metal patch 1411, The sum of the lengths of the ninth metal patch 1412 and the tenth metal patch 1413 is half of the wavelength corresponding to the center frequency of the second passband; the second open circuit section 142 includes the eleventh metal patch, The eleventh metal patch is perpendicular to the eighth metal patch 1411, and the eleventh metal patch is connected to the middle of the eighth metal patch 1411. The length of the eleventh metal patch corresponds to the center frequency of the second frequency point. one-quarter of the wavelength.

In some embodiments, the length of the second open-circuit stub 142 is greater than or equal to 0.95 mm and less than or equal to 1.05 mm, thereby generating a transmission zero point near 70 GHz. The length of the second open circuit section 142 is preferably 1 mm to facilitate production.

Please refer to Figures 2-5 and 10. In a second aspect, an embodiment of the present application provides an antenna array 300, including at least one antenna body 200. Each antenna body 200 includes two sets of symmetrically arranged antenna structures and any of the above-mentioned antenna structures. In the frequency divider 100 of an embodiment, each frequency divider 100 corresponds to an antenna structure, and the connection structure 170 is connected to the antenna body 200 .

As shown in Figure 2-5, in some embodiments, the antenna body 200 can be a dual-polarized antenna that combines two polarization directions of +45 degrees and -45 degrees that are orthogonal to each other. In other embodiments, the antenna The main body 200 can be a dual-polarized antenna that combines two polarization directions of 0 degrees and 90 degrees that are orthogonal to each other, or a dual-polarized antenna that is implemented in other ways that satisfy the orthogonality of the dual-polarization electric field vectors (included angle is 90 degrees). .

In order to verify the isolation effect of the frequency divider 100, the frequency divider 100 can be simulated and tested. Figure 7 is a schematic diagram of the ports of the frequency divider 100 in an embodiment of the present application. Port A in Figure 7 is connected to the antenna structure. When the antenna structure receives a signal, the signal at port A is an unfiltered signal, port B is a signal filtered by the first filtering structure 110 , and port C is a signal filtered by the second filtering structure 140 .

The results of the simulation test are shown in Figure 8. Figure 8 is a schematic diagram of the frequency response of the frequency divider 100 in an embodiment of the present application. The figure shows that the frequency divider 100 detects A when dividing and filtering the broadband signal received by the antenna. Related parameters at port, B port and C port. Specifically, in the figure, S01 is the signal of the C port, S02 is the reflection coefficient of the C port, S03 is the reflection coefficient of the A port, S04 is the signal of the B port, S05 is the isolation, and S06 is the reflection coefficient of the B port.

It can be seen from Figure 8 that the isolation of the frequency divider 100 in the embodiment of the present application is greater than 18dB in the 25GHz-33GHz frequency band, and greater than 20dB in the 27GHz-44GHz frequency band. Compared with ordinary power dividers, the isolation of the frequency divider 100 in the embodiment of the present application is significantly improved.

As shown in Figures 2-5 and 9, in some embodiments, each antenna structure includes 10 wiring layers, namely M01-M10 in Figure 9, and 9 dielectric layers, such as D01-D09, where The 10 wiring layers include at least the radiation layer M01, the feed layer M04, the first ground layer M06 and the second ground layer M08.

The middle black color block of the radiation layer M01 is the antenna patch 210 used for transmitting and receiving signals.

The feed layer M04 is provided between the first ground layer M06 and the radiation layer M01. The black color block in the feed layer M04 is the coupling unit 230 coupled with the antenna patch 210 of the radiation layer M01. The coupling unit 230 and the antenna patch 210 coupling.

The first ground layer M06 is used to form a first resonant circuit with the antenna patch 210 so that the antenna patch 210 receives or sends signals. The black color block in the first ground layer M06 is the ground plate.

The second ground layer M08 is disposed between the first ground layer M06 and the frequency divider 100. The second ground layer M08 is used to form a second resonant circuit with the frequency divider 100. The second ground layer M08 is independent of the first ground layer M06. settings to reduce interference. The black color block in the second ground layer M06 is the ground plate.

The frequency divider 100 is disposed on the side of the first ground layer M06 away from the feed layer M04, and the connection structure 170 is connected to the coupling unit 230 in the feed layer M04; in the figure, M09 forms a second filter structure 140, and M10 forms a first The filter structure 110, the first feeder 120, the second feeder 130, the third feeder 150 and the fourth feeder 160, the ground plates in M08 and M06 are provided with via holes, and the connection structure 170 passes through the via holes to connect M10 and M04.

As shown in FIG. 1 , in some embodiments, the connection structure 170 includes a first connection part 171 , a communication column 172 and a second connection part 173 . As shown in FIG. 6 , the first connecting part 171 includes a straight section 1711 and an arc section 1712 disposed in the middle of the straight section 1711 . The two ends of the straight section 1711 are respectively connected to the second feeder 130 and the third feeder 150 . One end of the communication column 172 is connected to the arc segment 1712 , and the other end of the communication column 172 is connected to the second connection part 173 , and the second connection part 173 is connected to the coupling unit 230 . Compared with the arc segment 1712, the width of the straight segment 1711 may be narrower to facilitate connection with the second feeder 130 and the third feeder 150. The width of the arc segment 1712 is wider to facilitate connection with the communication column 172 . The shape of the arc segment 1712 may be circular, and the shape of the second connecting part 173 may be similar to the shape of the arc segment 1712 . Of course, the connection structure 170 can also have other shapes, as long as the impedance matching between the connection structure 170 and the antenna structure is met. Generally speaking, the impedance of the antenna structure is 50 ohms.

As shown in FIG. 5 , in some embodiments, the coupling unit 230 is sector-shaped. The coupling unit 230 is used to excite the antenna patch 210 . The sector-shaped coupling unit 230 can maximize the antenna bandwidth. In other embodiments, the coupling unit 230 may also have other shapes.

As shown in Figure 10, in some embodiments, the antenna array 300 includes 8 groups of antenna bodies 200 arranged in sequence, using a periodic arrangement to achieve a broadband frequency response, and its coverage range is at least from 24.25GHz to 43.5GHz, which can meet The current n257, n258, n259, n260, n261, and n262 frequency bands in 5GFR2. The spacing between each antenna body 200 is less than or equal to half of the wavelength corresponding to the central resonant frequency of the first passband, which is beneficial to eliminating grating lobes.

In the drawings of this embodiment, the same or similar numbers correspond to the same or similar components; in the description of this application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation or a specific orientation. Construction and operation, therefore the terms describing the positional relationships in the drawings are only for illustrative purposes and cannot be understood as limitations of the patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application shall be included in the protection of the present application. within the range.

Claims (10)

1. An antenna array is characterized by comprising at least one antenna body, wherein each antenna body comprises two groups of symmetrically arranged antenna structures and frequency dividers, and each frequency divider corresponds to one antenna structure;

the frequency divider includes:

the first filter structure is provided with a first passband and is used for generating a transmission zero point at a first frequency point;

the first feeder line is coupled with one end of the first filtering structure;

the second feeder line is coupled with the other end of the first filtering structure;

the second filtering structure is provided with a second passband, the lowest frequency of the first passband is higher than the highest frequency of the second passband, the second filtering structure is used for generating a transmission zero point at a second frequency point, the first frequency point and the second frequency point are both positioned between the lowest frequency of the first passband and the highest frequency of the second passband, and the frequency of the first frequency point is lower than the frequency of the second frequency point;

the third feeder line is coupled with one end of the second filtering structure;

the fourth feeder line is coupled with the other end of the second filtering structure; and

The connecting structure is connected with the second feeder line and the third feeder line and is used for conducting signals received and transmitted by an external antenna;

each of the antenna structures includes:

a radiation layer having an antenna patch for transmitting and receiving signals;

a first ground layer having a ground plate for forming a first resonant tank with the radiation layer;

the feed layer is arranged between the first grounding layer and the radiation layer, a coupling unit is arranged, the coupling unit is coupled with the antenna patch, the frequency divider is arranged at one side of the first grounding layer away from the feed layer, and the connection structure is connected with the feed layer; and

The second grounding layer is arranged between the first grounding layer and the frequency divider, and the second grounding layer is used for forming a second resonant circuit with the frequency divider.

2. The antenna array of claim 1, wherein the second feed line is closer to the second filtering structure than the first feed line, the third feed line is closer to the first filtering structure than the fourth feed line, and the connection structure is disposed between the second feed line and the third feed line.

3. The antenna array of claim 1, wherein the first filtering structure comprises:

the two ends of the first resonator are open-circuited, the two ends of the first resonator are respectively coupled with the first feeder line and the second feeder line, and the length of the first resonator is one half of the wavelength corresponding to the center resonance frequency of the first passband; and

And the length of the first open stub is one quarter of the wavelength corresponding to the frequency of the first frequency point.

4. The antenna array of claim 3, wherein the first resonator comprises a first metal patch, and a second metal patch and a third metal patch perpendicular to the first metal patch, respectively, the second metal patch and the third metal patch are connected to two ends of the first metal patch, respectively, and the second metal patch and the third metal patch are located on the same side of the first metal patch, and a sum of lengths of the first metal patch, the second metal patch, and the third metal patch is one half of a wavelength corresponding to a center resonance frequency of the first passband;

the first open-circuit stub comprises a fourth metal patch and a fifth metal patch, a sixth metal patch and a seventh metal patch which are vertically connected to the same side of the fourth metal patch, the fourth metal patch is parallel to the first metal patch, the fifth metal patch and the sixth metal patch are arranged between the second metal patch and the third metal patch and are respectively connected to two ends of the fourth metal patch, the seventh metal patch is arranged between the fifth metal patch and the sixth metal patch, two ends of the seventh metal patch are respectively connected with the middle part of the first metal patch and the middle part of the fourth metal patch, and the sum of the lengths of the fourth metal patch, the fifth metal patch and the seventh metal patch is one fourth of the wavelength corresponding to the frequency of the first frequency point.

5. The antenna array of claim 3, wherein the length of the first open stub is 1.35mm or greater and 1.45mm or less.

6. The antenna array of claim 1, wherein the second filtering structure comprises:

the two ends of the second resonator are open-circuited, the two ends of the second resonator are respectively coupled with the third feeder line and the fourth feeder line, and the length of the second resonator is one half of the wavelength corresponding to the center frequency of the second passband; and

And the second open stub is connected with the second resonator, and the length of the second open stub is one quarter of the wavelength corresponding to the center frequency of the second frequency point.

7. The antenna array of claim 6, wherein the second resonator comprises an eighth metal patch and a ninth metal patch and a tenth metal patch perpendicular to the eighth metal patch, respectively, the ninth metal patch and the tenth metal patch being connected to two ends of the eighth metal patch, respectively, and the ninth metal patch and the tenth metal patch being located on the same side of the eighth metal patch, a sum of lengths of the eighth metal patch, the ninth metal patch and the tenth metal patch being a half of a wavelength corresponding to a center frequency of the second passband;

the second open-circuit stub comprises an eleventh metal patch, the eleventh metal patch is perpendicular to the eighth metal patch, the eleventh metal patch is connected with the eighth metal patch and located between the ninth metal patch and the tenth metal patch, and the length of the eleventh metal patch is one quarter of a wavelength corresponding to the center frequency of the second frequency point.

8. The antenna array of claim 6, wherein the length of the second open stub is 0.95mm or greater and 1.05mm or less.

9. The antenna array of claim 1, wherein the connection structure comprises:

the first connecting part comprises a straight section and an arc-shaped section arranged in the middle of the straight section, and two ends of the straight section are respectively connected with the second feeder line and the third feeder line;

the connecting column is connected with one end of the arc section; and

And the other end of the communication column is connected with the second connecting part, and the second connecting part is connected with the coupling unit.

10. The antenna array of claim 1, wherein the antenna array comprises 8 groups of the antenna bodies arranged in sequence, and a spacing between each of the antenna bodies is less than or equal to one half a wavelength corresponding to a center resonance frequency of the first passband.